chem - equilibrium

Question 1

If Keq < 1, then ln(Keq) is __________, making the ΔG° __________

If Keq = 1, then ln(Keq) is __________, making the ΔG° __________

If Keq > 1, then ln(Keq) is __________, making the ΔG° __________

Answer 1

ΔG° = -RT ln(Keq)

If Keq < 1, then ln(Keq) is negative, making the ΔG° positive (non-spontaneous)

If Keq = 1, then ln(Keq) is zero, making the ΔG° equal to zero

If Keq > 1, then ln(Keq) is positive, making the ΔG° negative (spontaneous)

Question 2

Describe the direction the reaction proceeds in for each:

Q < Keq

Q > Keq

Answer 2

Q < Keq
- higher conc of reactants than there is at equilibrium
- reaction proceeds in FORWARD direction

Q > Keq
- higher conc of products than there is at equilibrium
- rxn proceeds in REVERSE direction

Question 3

strong acids:

strong bases:

Answer 3

Strong acids:
1. HCl
2. HBr
3. HI
4. HNO3
5. HClO4
6. HClO3
7. H2SO4

Strong bases:
1. LiOH
2. NaOH
3. KOH
4. RbOH
5. CsOH
6. Ca(OH)2
7. Sr(OH)2
8. Ba(OH)2

Question 4

If Keq < 1

If Keq = 1

If Keq > 1

Answer 4

If Keq < 1, then there is greater concentration of reactants than products at equilibrium

If Keq = 1, then the ratio of products to reactants concentration is equal at equilibrium

If Keq > 1, then there is greater concentration of products than reactants at equilibrium